Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24a3bc13d793f78…

MALICIOUS

PDF

95.1 KB Created: 2020-11-19 04:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7f668a8ac45f47e4ac984ca058432a45 SHA-1: 33013cd46f899406985dc8a48ff3d8622bf4d31e SHA-256: d24a3bc13d793f788d9389598fa81bf65006d2840d3e11dcf0f609881606ae1b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified as a link farm, and is flagged by ClamAV as 'Pdf.Phishing.Trojan'. The embedded document body, though heavily obfuscated, contains text related to 'Epheria sailboat accessories' and the wkhtmltopdf tool, suggesting a lure to a malicious website. The presence of multiple external URLs indicates an attempt to redirect the user, likely to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/strik?utm_term=epheria+sailboat+accessories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8af1d645f11.pdfIn PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/8219342.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/1124448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_5f9509e7e6dd2.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/e9756cb1c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_5fa01657b1247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_5fa5e7445f34b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f952dcb7716a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5f9d2b39c9cde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/852aea73-a756-48e1-8ed9-68a9b282f674/xituzifimafasobuxademeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ae4a22-daa5-4536-900f-08f5ae02eecf/woxerima.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 5120 bytes
SHA-256: 8716f12b1d50b3e288890de4bd64f71b81232288d1a38f3b1511a502a61dfaee
font_01_sfnt_off00014005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14005 1796 bytes
SHA-256: 68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6
font_02_sfnt_off00014890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14890 11984 bytes
SHA-256: 9819feb39b0b04c80f24e4c8a68dbf5b396f681e6504e3527dede751383c0c07

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